期刊
OPTICS COMMUNICATIONS
卷 292, 期 -, 页码 84-86出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2012.11.012
关键词
Mach-Zehnder interferometer; Refractometer; Waist-enlarged fusion bitaper
类别
资金
- National Basic Research Program of China (973 Program) [2010CB327804]
- National Natural Science Foundation of China [60807021]
- Natural Science Foundation of Zhejiang Province China [R1080087]
A miniature refractometer by using a Mach-Zehnder interferometer (MZI) in a standard single mode fiber (SMF) with two waist-enlarged fusion bitapers is proposed and experimentally demonstrated. Such an all-fiber SMF-MZI incorporates an intermodal interference between the core mode and cladding modes. Because the cladding modes are sensitive to the external environment, the SMF-MZI is exploited for refractive index measurement. Experimentally, high sensitivity of 266.5 nm/RIU and resolution of 3.75 x 10(-5) RIU are achieved within a range from 1346 to 1.4412. The temperature effect of the proposed refractometer is also analyzed. (C) 2012 Elsevier B.V. All rights reserved.
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